Symptoms
- Cubes are smaller than normal
- Cubes look hollow or crescent-shaped only
- Ice production has slowed down
- Some cycles produce no cube at all
Likely causes
- CommonClogged or overdue water filterA restricted filter reduces the water flow into each cube slot, leading to partial fills.
- CommonLow household water pressureIce makers need a minimum pressure to fill the tray fully; low pressure from the supply line causes small cubes.
- CommonPartially closed water supply valveA valve that is not fully open restricts flow even though water is reaching the unit.
- PossibleKinked or narrow-diameter water lineA thin or pinched line, especially plastic tubing, can bottleneck flow.
- PossibleFailing water inlet valveA weak valve may open but not pass full flow, producing consistently undersized ice.
What to do
- Replace the water filter if it is more than 6 months old or flow has been declining.
- Check that the water shutoff valve behind the fridge or under the sink is turned fully open.
- Inspect the water line for kinks, sharp bends, or crushed sections and straighten or reroute as needed.
- If the line is thin plastic tubing, consider upgrading to braided supply line for better flow.
- Run a few cycles and observe the fill; if cubes stay small after a fresh filter and full-open valve, the inlet valve may be weak.
- Test household water pressure at a nearby faucet; pressure below about 20 psi at the fridge may need a plumber's attention.
Tools and parts
- Wrench
- Flashlight
Refrigerator water filterSearch: “refrigerator water filter replacement”
Braided ice maker supply lineSearch: “ice maker water supply line”
When to call a pro
If a new filter and fully open valve don't fix it, an appliance technician can test the water inlet valve and fill time.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.